TITLE: GROOVY — Lava Lamp FILE: 062-lava-lamp.html === PROMPT (exact prompt used) === Build "GROOVY — Lava Lamp", a 1970s lava lamp rendered with real metaball physics. A classic lamp silhouette (chrome/gold base and cap drawn in SVG with metallic gradients) centred on warm retro wallpaper (repeating SVG pattern of orange/brown circles, #f4a259, #bc4b51, #5b8e7d on #f4e1c1). Inside the glass, wax blobs heated at the bottom rise, cool and sink, merging and splitting (metaball field computed on a low-resolution grid with smooth thresholded edges, glossy highlights and inner glow). Colour combinations: "Classic" (red wax in yellow liquid), "Purple Haze" (magenta in blue), "Lime" (green in violet) and "Ocean". Interaction: click the lamp's switch to turn it on/off (the light fades, the wax slows and settles); a temperature knob; a colour-combo switch; the pointer heats the glass locally. The whole room's glow is tinted by the lamp colour. Typography: a groovy rounded bold display with an outline shadow. SHARED REQUIREMENTS (apply to every page in this 100-page collection): 1. One standalone HTML5 file. All CSS inline in